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Helium gas is a colorless, odorless inert gaseous element occurring in natural gas and with radioactive ores. It is used as a component of artificial atmospheres and laser media, as a refrigerant, as a lifting gas for balloons, and as a superfluid in cryogenic research.
Vapor Phase Impurities
| He | >= | 99.995% | %V |
| N2+Kr | =< | 10 | ppmv |
| O2+Ar | =< | 3 | ppmv |
| H2 | =< | 3 | ppmv |
| Ne | =< | 15 | ppmv |
| CO | =< | 1 | ppmv |
| CO2 | =< | 1 | ppmv |
| H2O | =< | 10 | ppmv |
| THC(CH4) | =< | 1 | ppmv |
| He | >= | 99.999% | %V |
| N2+Kr | =< | 2 | ppmv |
| O2+Ar | =< | 1 | ppmv |
| H2 | =< | 1 | ppmv |
| Ne | =< | 4 | ppmv |
| CO | =< | 0.5 | ppmv |
| CO2 | =< | 0.5 | ppmv |
| H2O | =< | 3 | ppmv |
| THC(CH4) | =< | 0.5 | ppmv |
Standard Package Information
Cylinder Type | DOT3AA2400 |
|
Fill Weight (ft3/m3) | 282/8.0 |
|
Valve Connection (CGA) | 580 |
|
Cylinder Dimension (cm) | ø23x140 |
High purity helium gas